The Lagoon Nebula (M8, NGC 6523)
Size: 0.57 degrees
Distance: 6500 light years
RA: 18h 04m 09s
Dec: 24 degrees 22' 00"
The Lagoon was first discovered because of the conspicuous cluster of
newly formed stars just to the left of center (NGC 6530). Like
many emission nebulae, the Lagoon is a stellar nursery that exhibits
interesting visual features. The red light results from
of hydrogen gas by radiation from nearby, young stars. The bluish
are due to light from nearby stars that is simply reflected by the gas.
The very dark regions represent gas that is comprised mostly of
dust that has not been excited to emit red light, and is too dense to
reflect blue light. These dark regions represent protostellar
material that will eventually condense to form new stars through
Date: August 23, 2003
Scope: LX90 at f5, Lumicon OAG
Autoguider: SBIG STV with e-finder
Camera: Canon 10D
Filter: IDAS LPS
Exposures: 2 x 10' each at ISO800
Conditions: Temperature 65 degress F; average transparency;
average seeing; wind minimal.
Post-processing: Raw conversion, adaptive dark frame subtraction,
averaging, and background compensation done in ImagesPlus; alignment in
Registar; levels and curves adjustment in Photoshop, with selective
reduction of the red channel done in Pleiades SGBNR software.
note: Graphics on this website
may not be reproduced without author permission.
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